患者大便变细，便意频繁，首先应行（）
A.直肠指检
B.粪便培养加药物敏感试验
C.X线钡剂灌肠检查
D.纤维结肠镜检查
E.乙状结肠镜检查
参考答案：A
After a serious illness, he finally _____ the importance of health. [ ]
A. realized
B. meant
C. added
D. impressed
预防-防御的目的是
